Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1979-12-26
1982-02-23
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430227, 430228, 430236, 430244, 430245, 430375, 430383, 430391, 430446, 430507, 430513, 430517, G03C 140, G03C 554, G03C 148, G03C 184
Patent
active
043169503
ABSTRACT:
In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein each R.sup.1 the same or different is hydrogen or alkyl, each R.sup.2 the same or different is alkyl or phenyl, R.sup.3 is phenyl or alkyl, Y is an electron-withdrawing group and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds.
REFERENCES:
patent: 1879537 (1932-09-01), Schneider
patent: 1994876 (1935-03-01), Schneider et al.
patent: 2182794 (1939-12-01), Dawson
patent: 2203767 (1940-06-01), Baldsiefen
patent: 2203768 (1940-06-01), Baldsiefen
patent: 2350090 (1944-05-01), Beilenson
patent: 3005711 (1961-10-01), Burgardt et al.
patent: 3406069 (1968-10-01), Overman
patent: 3615548 (1971-10-01), Firestine
Beilstein's Handbuch der Organischen Chemie, vol. 27, p. 534.
Cincotta Louis
Foley James W.
Campbell Sybil A.
Polaroid Corporation
Schilling Richard L.
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